Salsa's Split Pivot Dropout Tool might get you out of a jam, adding no weight to your equipment. This handy tool works as a headset top cap until you need it, and when combined with a 6mm hex wrench, turns into a socket for removing the Pivot Bolt to change your derailleur hanger - Lightweight aluminum bolt - For all Salsa Split Pivot suspension models - Integrated 22mm socket design interfaces axle nut to field-change the derailleur hanger - Operated via 6mm hex key found on most mini tools - Takes place of standard top cap - Eliminates the need to carry a 22mm wrench or socket in your pack - Lightweight, black anodized aluminum bolt included - 13g